A new formulation using the Schur complement for the numerical existence proof of solutions to elliptic problems: without direct estimation for an inverse of the linearized operator
A new formulation using the Schur complement for the numerical existence proof of solutions to elliptic problems: without direct estimation for an inverse of the linearized operator
复制标题
使用 Schur 补集来证明椭圆问题解的数值存在性的新公式:无需直接估计线性算子的逆
DOI:
10.1007/s00211-020-01155-7
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发表时间:
2020
影响因子:
2.1
通讯作者:
Oishi Shin’ichi
中科院分区:
文献类型:
--
作者:
Sekine Kouta;Nakao Mitsuhiro T.;Oishi Shin’ichi
Infinite-dimensional Newton methods can be effectively used to derive numerical proofs of the existence of solutions to partial differential equations (PDEs). In computer-assisted proofs of PDEs, the original problem is transformed into the infinite-dimensional Newton-type fixed point equation, whereis a linearized operator,is a residual, andis a nonlinear term. Therefore, the estimations ofandplay major roles in the verification procedures . In this paper, using a similar concept to block Gaussian elimination and its corresponding ‘Schur complement’ for matrix problems, we represent the inverse operatoras an infinite-dimensional operator matrix that can be decomposed into two parts: finite-dimensional and infinite-dimensional. This operator matrix yields a new effective realization of the infinite-dimensional Newton method, which enables a more efficient verification procedure compared with existing Nakao’s methods for the solution of elliptic PDEs. We present some numerical examples that confirm the usefulness of the proposed method. Related results obtained from the representation of the operator matrix asare presented in the “Appendix”.
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影响因子:
0.9
作者:
H. Okamoto
通讯作者:
H. Okamoto
影响因子:
0.9
作者:
Watanabe Yoshitaka;Kinoshita Takehiko;Nakao Mitsuhiro T.
通讯作者:
Nakao Mitsuhiro T.
DOI:
--
发表时间:
1988
期刊:
影响因子:
--
作者:
M. Nakao
通讯作者:
M. Nakao
DOI:
--
发表时间:
2008
期刊:
Journal of Computational and Applied Mathematics 218
影响因子:
--
作者:
Nakao;M. T. and Hashimoto;K.
通讯作者:
K.
影响因子:
0.9
作者:
Yoshitaka Watanabe;M. Nakao
通讯作者:
M. Nakao